CHAP 2, SEC III
DESCRIPTION AND OPERATION OF
PAR 25-27
RIGHT- AND LEFT-OUTPUT DRIVE ASSEMBLIES
b. O p e r a t i on
(2) Foreign matter in the oil col-
.
lects in the filter element.
(1) Oil from the pressure pumps
is directed through the oil filter element
and then back into the system.
Section III. DESCRIPTION AND OPERATION OF RIGHT- AND
LEFT-OUTPUT DRIVE ASSEMBLIES
26. RIGHT-OUTPUT DRIVE ASSEMBLY
a. Components (fig. 386, fold-out 15)
(1) The right-output drive assem-
bly includes shaft 39, carrier assembly 41,
internal gear 23, output shaft assembly 1,
bearings 12 and 17, seal assembly 5, re-
t a i n e r 1 0 , h o u s i n g a s s e m b l y 1 4 , s a d d le
assembly 35 and saddle cap 28.
(2) Shaft 39 is the driving mem-
ber which connects the transmission left-
output coupling to the right-output drive.
It is splined at the transmission end and
includes an integral 17-tooth sun gear at
the opposite end. Planetary carrier assem-
bly 41 includes carrier 43, three 37-tooth
pinions 47 and three spindles 42. The pin-
ions rotate on needle bearing rollers 46 on
the spindles mounted in the carrier. The
carrier is stationary and is the reaction
m e m b e r .
(3) Internal gear 23 is the driven
m e m b e r a n d h a s 9 1 i n t e r n a l t e e t h . A
splined hub on the ring gear meshes with
the splined end of output drive shaft 4.
Roller bearing 12 supports the outer end
of the output shaft in housing assembly 14,
while roller bearing 17 supports the inner
end. Retainer 10 positions the bearing and
houses oil seal 5. Ten studs are fitted in
the outer flange of the output shaft, for
attaching the track sprocket hub.
( 4 ) H o u s i n g a s s e m b l y 1 4 h o u s es
and supports the output drive outer com-
ponents. Saddle 37 houses and supports
t h e o u t p u t d r i v e i n n e r c o m p o n e n t s a nd
provides a mount for the rear of the trans-
mission. The carrier assembly is anchored
to the saddle assembly by 24 bolts 33. The
housing assembly and saddle assembly are
h e l d t o g e t h e r b y t h r e e s l o t t e d m a c h i ne
screws 30. When mounted in the vehicle
hull, 24 bolts pass through holes in both
the housing and saddle to anchor the com-
plete output drive assembly to the vehicle.
(5) A hub on the transmission is
positioned between the saddle and saddle
cap 28. Seals are provided at this connec-
tion to prevent leakage of oil. The output
drive has its own oil supply. A plug 26 on
the saddle cap is the oil filler plug. Plug
13 at the bottom of housing assembly 14 is
the drain plug. Front and rear check plugs
15 are installed angularly from the drain
plug. Lubrication within the output drive
is the splash system.
b. Operation (fig. 386, fold-out 15)
—
(1) The transmission left output
is coupled to the splined end of shaft 39.
Shaft 39 rotates within pinion assembly
47. The carrier is stationary, causing the
pinions to rotate in a direction opposite to
that of shaft 39. The pinions are in mesh
with internal gear 23 which also must ro-
t a t e i n a d i r e c t i o n o p p o s i t e t o t h a t of
shaft 39. The rotation of internal gear 23
is transmitted to output drive shaft 4 and,
in turn, to the vehicle tracks.
(2) The output drive thus reverses
the direction of rotation available at the
transmission output. Speed reduction with-
in the output drive is 5.35:1.
27. LEFT-OUTPUT DRIVE ASSEMBLY
a . C o m p o n e n t s ( f i g . 3 8 5 , f o l d - o u t
14). The left-output drive components are
identical to those of tine right-output drive
except for shaft 16 and saddle 8. These
components are longer in the left- output
drive.
b. Operation (fig. 385, fold-out 14).
The operation of the left-output drive as-
sembly is identical to the right assembly.
24 Change 2
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